Web Services Development MCQs with Answers
Practice important Web Services Development MCQs with answers and explanations.
Chapter: 5
Q141:
The operator "--" in Java ________ a variable's value by 1.
A. Increments
B. Decrements
C. Multiplies
D. Divides
Correct Answer:
B
Chapter: 5
Q142:
The Java for loop syntax includes which of the following components?
A. Initialization, condition, increment
B. Condition only
C. Initialization only
D. Condition, increment only
Correct Answer:
A
Chapter: 5
Q143:
What is the purpose of using the postfix increment operator in an expression?
A. To apply the operator before the expression is evaluated
B. To apply the operator after the expression is evaluated
C. To reset the expression
D. To ignore the expression
Correct Answer:
B
Chapter: 5
Q144:
What happens when a nested loop structure is executed?
A. Only the outer loop runs
B. Only the inner loop runs
C. Both loops run independently
D. The inner loop runs within the outer loop
Correct Answer:
D
Chapter: 5
Q145:
Fill in the blank: In Java, the unary increment operator ________ a variable's value by 1.
A. increases
B. decreases
C. multiplies
D. divides
Correct Answer:
A
Chapter: 5
Q146:
Fill in the blank: The loop-continuation condition in a for loop is evaluated ________ the loop body executes.
A. before
B. after
C. during
D. twice
Correct Answer:
A
Chapter: 5
Q147:
Fill in the blank: A common error in counter-controlled loops is the ________ error.
A. off-by-one
B. syntax
C. overflow
D. underflow
Correct Answer:
A
Chapter: 6
Q148:
An array is an object containing a list of elements of _______.
A. the same data type
B. different data types
C. mixed data types
D. unknown data types
Correct Answer:
A
Chapter: 6
Q149:
What is the correct syntax to declare an array reference variable named dailySales?
A. double[] dailySales
B. double dailySales[]
C. double[] dailySales = new double[7]
D. double dailySales = new double[]
Correct Answer:
A
Chapter: 6
Q150:
In Java, which operator is used to create an array object?
A. new
B. operator
C. create
D. assign
Correct Answer:
B
Chapter: 6
Q151:
The size of an array in Java is determined by the _______.
A. array reference variable
B. data type
C. array size declarator
D. compiler
Correct Answer:
C
Chapter: 6
Q152:
How many elements can the array 'dailySales' hold if it is declared as 'double[] dailySales = new double[7];'?
A. 7
B. 10
C. 5
D. 15
Correct Answer:
A
Chapter: 6
Q153:
Which of the following statements correctly initializes an array named num with 10 integers?
A. int[] num = new int[10];
B. int[] num = new int[5];
C. int num = new int[10];
D. int[] num;
Correct Answer:
C
Chapter: 6
Q154:
In a one-dimensional array, how are elements stored in memory?
A. In a line
B. Row-wise
C. Column-wise
D. Randomly
Correct Answer:
A
Chapter: 6
Q155:
In a two-dimensional array, elements are stored _______.
A. row-wise
B. column-wise
C. in a zigzag pattern
D. in a line
Correct Answer:
A
Chapter: 6
Q156:
A multi-dimensional array can be considered as _______.
A. an array of arrays
B. a single list of elements
C. a simple array
D. none of these
Correct Answer:
A
Chapter: 6
Q157:
What is the correct way to iterate over a one-dimensional array in Java?
A. using a for loop
B. using a while loop
C. using a do-while loop
D. using a switch statement
Correct Answer:
A
Chapter: 6
Q158:
To iterate over a two-dimensional array, we use _______.
A. a single for loop
B. two nested for loops
C. a while loop
D. a do-while loop
Correct Answer:
B
Chapter: 6
Q159:
Which method is used to get the length of an array dimension in a multidimensional array?
A. GetLength()
B. GetLowerBound()
C. GetUpperBound()
D. GetArraySize()
Correct Answer:
A
Chapter: 6
Q160:
Which of the following is TRUE about pseudo-random numbers generated by java.util.Random?
A. They are completely random
B. They are predictable
C. They are not truly random
D. They are cryptographically secure
Correct Answer:
C