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Single Choice Easy

QPredict the output:-


String str1 = "great";
String str2 = "minds";

System.out.println(str1.substring(0, 2).concat(str2.substring(1)));
System.out.println("WH" + (str1.substring(2).toUpperCase()));

ID: #22227 switch case in Java 103 views

Question Info

#22227Q ID

EasyDifficulty

switch case in JavaTopic

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A
grinds
WHEAT ✔ ✖
B
gre
WHEAT ✔ ✖
C
grind
WHEA ✔ ✖
D
none of these
✔ ✖

Correct Answer

Explanation

Let's analyze the given Java code step by step to predict its output:

Code:


String str1 = "great";
String str2 = "minds";

System.out.println(str1.substring(0, 2).concat(str2.substring(1)));
System.out.println("WH" + (str1.substring(2).toUpperCase()));

Explanation:

First Line:

System.out.println(str1.substring(0, 2).concat(str2.substring(1)));\
- str1.substring(0, 2) extracts a substring from str1 starting at index 0 up to, but not including, index 2.
For str1 = "great", str1.substring(0, 2) results in "gr".
- str2.substring(1) extracts a substring from str2 starting at index 1 to the end of the string.
For str2 = "minds", str2.substring(1) results in "inds".
- Concatenating these results:
"gr".concat("inds") results in "grinds".
- Therefore, the first println statement prints "grinds".
Second Line:

System.out.println("WH" + (str1.substring(2).toUpperCase()));
- str1.substring(2) extracts a substring from str1 starting at index 2 to the end of the string.
For str1 = "great", str1.substring(2) results in "eat".
- str1.substring(2).toUpperCase() converts this substring to uppercase.
"eat".toUpperCase() results in "EAT".
- Concatenating "WH" with the result:
"WH" + "EAT" results in "WHEAT".
- Therefore, the second println statement prints "WHEAT".

Conclusion:

The output of the code is:

grinds
WHEAT

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QPredict the output:- String str1 = "great"; String str2 = "minds"; System.out.println(str1.substring(0, 2).concat(str2.substring(1))); System.out.println("WH" + (str1.substring(2).toUpperCase()));