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Questions and Answers
What will be the output of the code snippet: printf(“%d
”, -a) if a = 25?
What will be the output of the code snippet: printf(“%d ”, -a) if a = 25?
- 0
- 25 and -2
- -25 (correct)
- 25
In the expression a + b * c, which operation is performed first?
In the expression a + b * c, which operation is performed first?
- Addition (+)
- Multiplication (*) (correct)
- Subtraction (-)
- Division (/)
Which of the following describes the associative property in arithmetic expressions?
Which of the following describes the associative property in arithmetic expressions?
- It determines the order of operations between different operators.
- It applies only to addition and subtraction operators.
- It applies to operators of the same precedence level. (correct)
- It makes parentheses unnecessary in all expressions.
What does the modulo operator (%) do?
What does the modulo operator (%) do?
If we have the expression (x + y) * z, what would be the equivalent expression without parentheses assuming standard operator precedence?
If we have the expression (x + y) * z, what would be the equivalent expression without parentheses assuming standard operator precedence?
What is the maximum positive value that can be represented by an unsigned char?
What is the maximum positive value that can be represented by an unsigned char?
Which modifier can be used to store both negative and positive numbers in an integer type?
Which modifier can be used to store both negative and positive numbers in an integer type?
Which of the following types has the smallest range of values?
Which of the following types has the smallest range of values?
What is the size of a signed long int on a 16-bit machine?
What is the size of a signed long int on a 16-bit machine?
Which of the following is considered an escape character?
Which of the following is considered an escape character?
What is the range of values for an unsigned int on a 16-bit machine?
What is the range of values for an unsigned int on a 16-bit machine?
What distinguishes a signed char from a regular char?
What distinguishes a signed char from a regular char?
Which type specifies that a variable can only hold positive values?
Which type specifies that a variable can only hold positive values?
What will be the result of the expression $a=(int) 21.3/(int)4.5$?
What will be the result of the expression $a=(int) 21.3/(int)4.5$?
What will the expression $x=(int) 7.5$ evaluate to?
What will the expression $x=(int) 7.5$ evaluate to?
What happens when a floating-point value is assigned to an integer variable?
What happens when a floating-point value is assigned to an integer variable?
How does the expression $p= cos((double)x)$ transform the variable x?
How does the expression $p= cos((double)x)$ transform the variable x?
In the expression $(float)6 / 4$, what will be the result?
In the expression $(float)6 / 4$, what will be the result?
What will be the output of result in the first printf statement in the code?
What will be the output of result in the first printf statement in the code?
What is the value of the expression 10 < 20?
What is the value of the expression 10 < 20?
How are expressions like a < b + c processed according to operator precedence?
How are expressions like a < b + c processed according to operator precedence?
What is the output of result in the second printf statement in the code?
What is the output of result in the second printf statement in the code?
What does the operator '!=' signify?
What does the operator '!=' signify?
Which of the following expressions is considered a relational expression?
Which of the following expressions is considered a relational expression?
In which order will the operations be processed for the expression a < b + c?
In which order will the operations be processed for the expression a < b + c?
Which of the following statements is true regarding relational operators?
Which of the following statements is true regarding relational operators?
What will be the output of the statement 'i1 = f1;' where f1 is a float with a value of 123.125?
What will be the output of the statement 'i1 = f1;' where f1 is a float with a value of 123.125?
What is the result of the operation 'i1 = i2 / 100;' if i2 is initialized to -150?
What is the result of the operation 'i1 = i2 / 100;' if i2 is initialized to -150?
What will 'f1 = i2 / 100.0;' yield if i2 is -150?
What will 'f1 = i2 / 100.0;' yield if i2 is -150?
Which assignment operator format correctly follows the precedence rules in C?
Which assignment operator format correctly follows the precedence rules in C?
In the conditional operator 'condition ? expression1 : expression2', what happens if the condition evaluates to FALSE?
In the conditional operator 'condition ? expression1 : expression2', what happens if the condition evaluates to FALSE?
What is the outcome of using 'count += 10;' in a C program?
What is the outcome of using 'count += 10;' in a C program?
What type of division is performed when an integer is divided by another integer in C?
What type of division is performed when an integer is divided by another integer in C?
Study Notes
Modifiers (Type Specifiers)
- short: Uses fewer bits (typically 8 bits).
- long: Allocates more bits (typically 32 bits).
- signed: Represents both negative and positive values.
- unsigned: Represents only positive values.
Size and Range of Values for 16-bit Machine (Integer Type)
- short int / signed short int:
- Size: 8 bits
- Range: -128 to 127
- unsigned short int:
- Size: 8 bits
- Range: 0 to 255
- int / signed int:
- Size: 16 bits
- Range: -32,768 to 32,767
- unsigned int:
- Size: 16 bits
- Range: 0 to 65,535
- long int / signed long int:
- Size: 32 bits
- Range: -2,147,483,648 to 2,147,483,647
- unsigned long int:
- Size: 32 bits
- Range: 0 to 4,294,967,295
Character Types
- char: Stores a single character (1 byte) with a range of -128 to 127.
- signed char: Same range as char; -128 to 127.
- unsigned char: Has a range of 0 to 255.
- ASCII is the primary encoding scheme for characters.
Unary Minus Operator
- Negates a value (e.g.,
-amakes 25 into -25).
Arithmetic Expressions
- Basic operators include +, -, *, /, and %.
- Operator precedence determines order of evaluation:
- High priority: *, /, %
- Low priority: +, -
- Parentheses can alter precedence (e.g.,
a + (b * c)). - Left-to-right associativity for most operators, including +.
Relational Operators
- Operators:
==,!=,<,>,<=,>=. - Lower precedence than arithmetic operators.
- Relational expressions yield true (1) or false (0).
- Example:
10 < 20results in true.
Type Casting
- Consists of converting one data type to another.
- For example:
(int) 29.55 + (int) 21.99results in 29 + 21.
Type Conversions in Expressions
- Conversions affect how values are processed:
- Truncation occurs when converting from float to int.
- Integer arithmetic produces integer results, while floating-point division results in real numbers.
Integer and Floating-Point Conversions
- Assigning integers to floating variables doesn't affect the value.
- Assigning floats to integers truncates the decimal.
- Integer division yields an integer result, while division involving floating points yields a float.
Assignment Operators
- Combine arithmetic operations with assignment (e.g.,
count += 10is equivalent tocount = count + 10). - Maintain operator precedence rules during assignment.
Conditional Operator
- Format:
condition ? expression1 : expression2. - Evaluates
condition; if true, evaluates and returnsexpression1, otherwise returnsexpression2.
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Description
This quiz covers the concept of modifiers (type specifiers) in programming, specifically focusing on short, long, signed, and unsigned integer types. Understand how these modifiers affect the size and range of values in a 16-bit machine. Test your knowledge of these fundamental programming concepts.
