Explore topic-wise MCQs in Java.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Java knowledge and support exam preparation. Choose a topic below to get started.

1.

The string class deals with string of only character type.

A. True
B. False
Answer» B. False
Discussion
2.

Function replace() accepts _____________ arguments.

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
3.

String trim() function is used to _______________________

A. Remove all the white spaces from the string
B. Remove white space from start of string
C. Remove white space at end of string
D. Remove white space from both the ends of string
Answer» E.
Discussion
4.

String class provides function toUpper() to _____________________

A. Convert first character to uppercase
B. Convert last character to uppercase
C. Convert the whole string characters to uppercase
D. Convert uppercase to lower and lower to uppercases
Answer» D. Convert uppercase to lower and lower to uppercases
Discussion
5.

The compareTo() function is used to ________________

A. Compare strings value to string object
B. Compare string value to string value
C. Compare string object to another string object
D. Compare string object to another string value
Answer» D. Compare string object to another string value
Discussion
6.

Function equals() is _______________ and equalIgnoreCase() is _________________

A. Case Insensitive, case insensitive
B. Case sensitive, Case insensitive
C. Case sensitive, case sensitive
D. Case insensitive, case sensitive
Answer» C. Case sensitive, case sensitive
Discussion
7.

The function lastIndexOf() is used to ___________________

A. Get the index of last occurrence of specified character in argument
B. Get the index of first occurrence of specified character in argument
C. Get the index of last occurrence of first character in string
D. Get the index of last occurrence of last character of string
Answer» B. Get the index of first occurrence of specified character in argument
Discussion
8.

String class have a concat() function that is used to _____________________

A. Replace old string by new string
B. Add two strings
C. Append one string at end of another string
D. Remove a string from end of one string
Answer» D. Remove a string from end of one string
Discussion
9.

If two index are given as argument to substring function then ___________________

A. String of length equal to sum of two arguments is returned
B. String starting from first index and of length equal to send argument
C. String starting from first index and of length equal to sum of two arguments
D. String starting from first index and ending at second index position
Answer» E.
Discussion
10.

If only one parameter is passed to substring function then __________________

A. It returns the character at the specified position
B. It returns the string of length 1 from the specified index
C. It returns the string from specified index till the end
D. It returns the string from starting of string till the specified index
Answer» D. It returns the string from starting of string till the specified index
Discussion
11.

Which is the function to get the character present at a particular index in the string?

A. char charAt(index);
B. char charIn(StringName);
C. char charAt(StringName);
D. char charIn(index);
E. ;c) char charAt(StringName);d) char charIn(index);
Answer» B. char charIn(StringName);
Discussion
12.

What does function length do in String class?

A. Returns length of string including null character
B. Returns length of string excluding null character
C. Returns length of substring
D. Returns size of string in bytes
Answer» C. Returns length of substring
Discussion
13.

How to declare an object of class String?

A. String object_Name = value;
B. String object_name = new;
C. String object_name= new value;
D. String object_name= value new;
Answer» B. String object_name = new;
Discussion
14.

Which is a true statement for object of String class?

A. Object are immutable
B. Object are mutable
C. Object are created only once
D. Object can’t be created
Answer» B. Object are mutable
Discussion
15.

FUNCTION_EQUALS()_IS_________________AND_EQUALIGNORECASE()_IS__________________?$

A. Case Insensitive, case insensitive
B. Case sensitive, Case insensitive
C. Case sensitive, case sensitive
D. Case insensitive, case sensitive
Answer» C. Case sensitive, case sensitive
Discussion
16.

String class provides function toUpper() to _____________________$

A. Convert first character to uppercase
B. Convert last character to uppercase
C. Convert the whole string characters to uppercase
D. Convert uppercase to lower and lower to uppercases
Answer» D. Convert uppercase to lower and lower to uppercases
Discussion
17.

The compareTo() function is used to ________________$

A. Compare strings value to string object
B. Compare string value to string value
C. Compare string object to another string object
D. Compare string object to another string value
Answer» D. Compare string object to another string value
Discussion
18.

If two arguments are passed to the indexOf() function then ___________________

A. Second argument indicates the occurrence number of specified character from starting
B. Second argument indicates the occurrence number of specified character from end
C. Second argument indicates the index of the character in first argument
D. Second argument indicates the index of the character from the last of the string
Answer» B. Second argument indicates the occurrence number of specified character from end
Discussion
19.

The function lastIndexOf() is used to __________________?

A. Get the index of last occurrence of specified character in argument
B. Get the index of first occurrence of specified character in argument
C. Get the index of last occurrence of first character in string
D. Get the index of last occurrence of last character of string
Answer» B. Get the index of first occurrence of specified character in argument
Discussion
20.

String in Java is a?

A. class
B. object
C. variable
D. character array
Answer» B. object
Discussion