In reality, many friends who have just graduated from college asked the editor that the spring recruitment was when the epidemic was the worst, and the thesis in the school had not been defended, so I have not been looking for a job, and now I have obtained a diploma, and I feel bad. Looking for a job. What should I do?
I think it’s very easy for fresh graduates to find a job, especially for Java development positions where fresh graduates generally face competition for academic qualifications, and the requirements for experience and ability are not too high.
Having said that, when facing people with the same starting point as themselves and competing for limited positions with themselves, many programmers who have just graduated still lack interview experience and skills, and lack the bargaining chip to win.
Focus
Java programmers who are just about to enter the industry pay attention, the so-called knowing oneself and the enemy, there is no end in battle. Not only in the final exams in the school, you have to wait for the teacher to draw the key points. The focus of the interview questions is here. Below are the latest Java interview questions from top-tier manufacturers such as Ali and Tencent. These are the questions for large companies. Small companies are also inseparable.
"BAT Java Interview Questions Collection"
The general content of the PDF file:
1. What are the characteristics of object-oriented?
2. What is the difference between the access modifiers public, private, protected, and not written (default)?
3. Is String the most basic data type?
4. float f=3.4; is it correct?
5. Short s1 = 1; s1 = s1 + 1; is there any error? short s1 = 1; s1 += 1; is there any error?
6. Does Java have goto?
7. What is the difference between int and Integer?
8. The difference between & and &&?
9. Explain the usage of stack, heap and static storage area in memory.
10. How much is Math.round(11.5)? How much is Math.round(-11.5)?
11. Can swtich act on byte, long, and string?
12.Use the most efficient method to calculate 2 times 8?
13. Does array have a length() method? Does String have a length() method?
14. How to break out of the current multiple nested loops in Java?
15. Can the constructor be overridden?
16. Two objects have the same value (x.equals(y) == true), but they can have different hash codes. Is this sentence correct?
17. Can I inherit the String class?
18. When an object is passed as a parameter to a method, this method can change the properties of the object and return the changed result. So, is it passed by value or by reference?
19. What is the difference between String and StringBuilder and StringBuffer?
20. The difference between Overload and Override. Can overloaded methods be distinguished based on the return type?
21. Describe the principle and mechanism of JVM loading class files?
22. Can a Chinese character be stored in a char variable? Why?
23. What are the similarities and differences between abstract class and interface?
24. What is the difference between Static Nested Class and Inner Class?
25. Will there be a memory leak in Java? Please describe briefly.
26. Can abstract methods be static at the same time, can they be native methods at the same time, and can they be modified by synchronized at the same time?
27. What is the difference between static variables and instance variables?
28. Is it possible to call a non-static method from within a static method?
29. How to implement object cloning?
30. What is GC? Why is there GC?
31. String s=new String("xyz"); How many string objects have been created?
32. Can an interface extend an interface? Can an abstract class implement an interface? Can an abstract class inherit a concrete class?
33. Can a ".java" source file contain multiple classes (not internal classes)? What are the restrictions?
34. Can Anonymous Inner Class inherit from other classes? Can the interface be implemented?
35. Can an inner class refer to the members of its containing class (outer class)? Are there any restrictions?
36. What are the uses of the final keyword in Java?
37. Point out the results of the following program:
38. Conversion between data types
①How to convert a character string to a basic data type?
②How to convert basic data types into strings?
39. How to reverse and replace character strings?
40. How to convert GB2312 encoded string to ISO-8859-1 encoded string?
41. Date and time
①How to get the year, month, day, hour, minute, and second?
②How to get the number of milliseconds from 0:00:00:00 on January 1, 1970 to the present?
③How to get the last day of a month?
④How to format the date?
42. Print the current moment of yesterday.
43. Compare Java and JavaSciprt.
44. When to use assert?
45. What is the difference between Error and Exception?
46. There is a return statement in try{}, then will the code in finally{} immediately after this try be executed, when is it executed, before or after return?
47. How does the Java language handle exceptions? How to use the keywords: throws, throw, try, catch, and finally?
48. What are the similarities and differences between runtime exceptions and checked exceptions?
49. List some of your common runtime exceptions?
50, the difference between final, finally, finalize?
......
Is it over here?
Of course not, the next article will show you the classification of Java advanced knowledge points.
Don't talk about super class. Can you let the interviewer shine during the interview, can you talk more about salary, these advanced knowledge depends on how well you master it!
The above information is free to receive the complete PDF and all answer analysis, add my little assistant VX [Interview] to receive it for free!
