Question

Part Two: Fill in the Blanks and True/False (24 total points - 2 points each) For each of the following, fill in the most appropriate word(s)phrase/solution in each blank 1) Keywords, identifiers and literals are all kinds of are simply groups of characters that are used for various purposes in a program. , which 2) The Java expression: 11 - 2 + 3 evaluates to 3) List the Java boolean (logical) operators in order from highest priority to lowest priority 4) Java variables can be categorized into types (values stored directly) and types (values are addresses of objects stored elsewhere). 5) We called instance methods that change the data in an object and instance methods that access the data in an object without changing it 6) If the instance variables in a new Java class are reference variables to already existing classes, we are building the new Java class via 7) As we discussed in lecture, Java arrays are consecutive) and (all locations (all values the same type). For each of the following statements, indicate if it is TRUE or FALSE. For each FALSE answer, briefly EXPLAIN WHY IT IS FALSE. 8) In Java it is fine to assign a float value to an int variable, but it is not ok to assign an int value to a float variable. 9) Java method variables are NOT automatically initialized but Java instance variables ARE automatically initialized. 10) In a Java switch statement, by default the code in each of the different switch cases is exclusive - meaning only the case that matches will execute. 11) The scope of a Java method variable is the point at which it is declared until the end of the block in which it is declared. 12) If written to a text file, the Java int value 12 and the Java int value 98765432 will both take up the same amount of space (32 bits).

Answer 1

Solution for the above questions :

Fill in the blanks :

1. Keyword, literals and identifier are all kinds of tokens, which are group of characters.
2. 11- 2*3 = 5 as computed according to bodmas rule.
3. Precedence of logical operators in java is as follows : ! > && > ||
4. Two types : Primitive(int. char, etc.) and Non primitive (also known as Reference data types eg. String, array objects)
5. Setters and Getters method which are used to change data or retrieve data of an object.
6. Not sure
7. Java arrays are contiguous and collection of similar data types.

True or False :

1. False : In java it is okay to store int value in float variable but not vice versa because loss of data may take place if we try to store larger float values in smaller int variable but in other case imlicit type conversion takes place and no data loss is suffered.
2. True : Java instance variables are automatically initialised but not method variables.
3. True : In switch case the case that matches the switch variable will only work. But if there is no break statement used then more cases can work, this condition is called fall through.
4. True : the scope of method variable is inside the block of method in which it is declared.
5. True : As file size is determined by the length of text in the file or number of texts in the file so here both will take same space

We are instructed to answer 4 subparts only but i have answered all the questions which i could answer.

Happy learning !!