Data Types in Programming

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Questions and Answers

What is the range of values that can be represented by a short data type?

  • −231 to 231
  • −128 to 127 (correct)
  • −1 to 1
  • −215 to 215

In scientific notation, what is the purpose of the power of 10?

  • To indicate the position of the decimal point
  • To separate the integral and fractional parts
  • To determine the precision of the floating-point representation
  • To determine the range of the floating-point representation (correct)

What happens when a value is moved to a higher-order data type in the datatype hierarchy?

  • The value is truncated
  • No information is lost (correct)
  • Information may be lost
  • The value is rounded

What is the purpose of the mantissa in floating-point representation?

<p>To represent the decimal part of the number (B)</p> Signup and view all the answers

What is the difference between float and double data types?

<p>Float is for single-precision floating point numbers, double is for double-precision (B)</p> Signup and view all the answers

What determines the precision of the floating-point representation?

<p>The number of digits the computer allows for the mantissa (C)</p> Signup and view all the answers

What happens when any of the quantities involved in a calculation are floating-point?

<p>The entire calculation is done using floating-point arithmetic. (D)</p> Signup and view all the answers

How can we ensure that a calculation is done using floating-point arithmetic in C?

<p>By making one of the quantities of type float. (C)</p> Signup and view all the answers

What is the purpose of keywords in C programming?

<p>To provide special meaning to the compiler and build the language. (A)</p> Signup and view all the answers

What is an identifier in C programming?

<p>A word chosen by the programmer to name a variable or function. (D)</p> Signup and view all the answers

What is the difference between a C program and a natural language document?

<p>A C program has special symbols and keywords. (B)</p> Signup and view all the answers

What is the purpose of using a placeholder like %.4f in the printf function?

<p>To specify the format of the output (A)</p> Signup and view all the answers

Why is the value of radius 1 in the expression radius=diameter/2?

<p>Because the result of integer division is always an integer (B)</p> Signup and view all the answers

What would be the result of the expression radius=diameter/2 if diameter is 3 and 2 is replaced with 2.0?

<p>(radius would be 1.5) (D)</p> Signup and view all the answers

What is the advantage of using variables in a program?

<p>It makes the program more readable and easier to understand (C)</p> Signup and view all the answers

Why is the value 2.0 used in the expression float radius=diameter/2.0?

<p>To ensure the result is a floating-point number (D)</p> Signup and view all the answers

What is the difference between the expressions float radius=diameter/2 and float radius=diameter/2.0?

<p>The first expression results in an integer, the second results in a floating-point number (A)</p> Signup and view all the answers

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