{"id":181553,"date":"2025-01-11T02:30:55","date_gmt":"2025-01-11T02:30:55","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=181553"},"modified":"2025-01-11T02:30:57","modified_gmt":"2025-01-11T02:30:57","slug":"1-what-will-be-the-output-of-the-following-statement","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/11\/1-what-will-be-the-output-of-the-following-statement\/","title":{"rendered":"1. What will be the output of the following statement"},"content":{"rendered":"\n<ol class=\"wp-block-list\">\n<li>What will be the output of the following statement ? int a=10; printf(&#8220;%d &amp;i&#8221;,a,10);<br>a) error<br>b) 10<br>c) 1010<br>d) none of these<\/li>\n\n\n\n<li>Which of the following special symbol allowed in a variable name?<br>A. (asterisk)<br>B. I (pipeline)<br>C. &#8211; (hyphen)<br>D. _ (underscore)<\/li>\n<\/ol>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. What will be the output of the following statement?<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>int a = 10;\nprintf(\"%d &amp;i\", a, 10);\n<\/code><\/pre>\n\n\n\n<p><strong>Answer: a) error<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>In this C code snippet, there is a syntax issue within the <code>printf()<\/code> function. The format string provided is <code>\"%d &amp;i\"<\/code>, but the variables supplied are <code>a<\/code> and <code>10<\/code>.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The format string <code>\"%d &amp;i\"<\/code> expects:\n<ul class=\"wp-block-list\">\n<li><code>%d<\/code> to format an integer, which corresponds to the variable <code>a<\/code> (with a value of 10).<\/li>\n\n\n\n<li><code>&amp;i<\/code> appears to be attempting to print the address of the variable <code>i<\/code>, but no variable named <code>i<\/code> is defined in the <code>printf()<\/code> function call. Since <code>i<\/code> is not declared, the program will fail to compile and result in an error.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>Therefore, the correct answer is <strong>a) error<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. Which of the following special symbols is allowed in a variable name?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A. (asterisk)<\/strong><\/li>\n\n\n\n<li><strong>B. | (pipeline)<\/strong><\/li>\n\n\n\n<li><strong>C. &#8211; (hyphen)<\/strong><\/li>\n\n\n\n<li><strong>D. _ (underscore)<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>Answer: D) _ (underscore)<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>In C and many other programming languages, variable names must adhere to specific rules regarding which characters are allowed. Let&#8217;s analyze the options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A. (asterisk)<\/strong>: The asterisk <code>*<\/code> is not allowed in variable names. It is used as a dereference operator for pointers in C, and it cannot be part of a variable name.<\/li>\n\n\n\n<li><strong>B. | (pipeline)<\/strong>: The pipeline <code>|<\/code> character is also not allowed in variable names. It is used as a bitwise OR operator in C, and it cannot be used in identifiers.<\/li>\n\n\n\n<li><strong>C. &#8211; (hyphen)<\/strong>: The hyphen <code>-<\/code> is not allowed in variable names because it is used as a subtraction operator. If used in a variable name, it would create ambiguity in the syntax, as the language would not know if you are subtracting something.<\/li>\n\n\n\n<li><strong>D. _ (underscore)<\/strong>: The underscore <code>_<\/code> is the only special symbol allowed in variable names. It is commonly used to separate words in a multi-word variable name (e.g., <code>my_variable_name<\/code>). It is a valid character in variable names and is frequently used in programming for readability, especially in languages that follow the &#8220;snake_case&#8221; naming convention.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">General Rules for Variable Names:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>A variable name can contain letters (<code>a-z<\/code>, <code>A-Z<\/code>), digits (<code>0-9<\/code>), and the underscore <code>_<\/code>.<\/li>\n\n\n\n<li>A variable name cannot start with a digit.<\/li>\n\n\n\n<li>Special characters like <code>*<\/code>, <code>|<\/code>, <code>-<\/code>, and others (apart from underscore) are not allowed in variable names.<\/li>\n\n\n\n<li>Keywords reserved by the language (e.g., <code>int<\/code>, <code>return<\/code>, <code>if<\/code>) cannot be used as variable names.<\/li>\n<\/ol>\n\n\n\n<p>Thus, the correct answer is <strong>D) _ (underscore)<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The correct answer and explanation is: 1. What will be the output of the following statement? Answer: a) error Explanation: In this C code snippet, there is a syntax issue within the printf() function. The format string provided is &#8220;%d &amp;i&#8221;, but the variables supplied are a and 10. Therefore, the correct answer is a) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-181553","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/181553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=181553"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/181553\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=181553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=181553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=181553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}